#include <iostream>

using namespace std;

int main() {
  unsigned u = 10, u2 = 42;
  cout << u2 - u << endl;
  cout << u - u2 << endl;

  int i = 10, i2 = 42;
  cout << i2 - i << endl;
  cout << i - i2 << endl;

  cout << i - u << endl;
  cout << u - i << endl;

  return 0;
}
